Currently i am 21 Years Old, i should be 22 in August, honestly i don't know if i can call myself young nowadays (like seriously Social Media and many Colleagues in my Campus makes me feel Ancient when talking about stuff with them like dayum)
But i still like Reading Book, though to be fair the amount of times that i spend to read a book is definitely less than the times i spent for Video Games for example, though in this case i guess it can't be helped.
My Book Collection right now is mostly Japanese's Light Novel like a lot of them, and i definitely still read them, non-JP Stuff probably my Sherlock Holmes' Collection.
If you're conflicted by being called Old or else because reading a book please don't be, the medium is great, there's many great series you can read from, you won't regret it.
This is only my personal opinion though, throughout ages and times, the stigma against a Medium will always existed especially if it's a new form of Medium, like there's still many people that said Video Games can't be arts nowadays, if you're focusing on those too much, it just gonna hurts your brain, it ain't worth it.
I guess what i'm trying to say is Book is ROCKS! Just do whatever dude.